They dont make it nearly impossible at all. Ive done it like 10 times you just say no you don't want any of their shit and you want written confirmation and have it within a week that the account is closed. If you close em all and dont do it like every week it doesnt hurt your credit. If it did how did I get 8300 credit line from the start with unemployed student status. Cause my credit is perfect and I do this shit whenever it comes around for a good deal. Paying shit late would hurt you way more than applying for a card and canceling it ever would. Which I also never do.

Now if you keep em all open that is a different story. Then you have tons of potential debt out there and they are more hesitant. Just close em all and your fine.

And another note. If you have bad money management and would actually charge this card up then you should skip this deal. Its only a good deal if you take the 100 close the account and be done with it.